Imaging optical lens system, image capturing unit and electronic device

The seven-element imaging optical lens system optimizes refractive powers and aspheric surfaces to address the balance of image quality, sensitivity, and field of view, enhancing performance across visible and infrared spectra.

EP4242717B1Active Publication Date: 2026-06-17LARGAN PRECISION
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
LARGAN PRECISION
Filing Date
2022-05-30
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Conventional optical systems face challenges in achieving a balance among high image quality, low sensitivity, proper aperture size, miniaturization, and desirable field of view due to advancements in semiconductor technology and increasing functionality requirements.

Method used

An imaging optical lens system with seven lens elements, including specific refractive powers, aspheric surfaces, and an aperture stop configuration, optimized by various conditions to enhance field of view, image quality, and flexibility across visible and infrared spectra.

Benefits of technology

The system achieves improved image quality, increased field of view, reduced size, and enhanced sensitivity while maintaining consistent focus across different wavelengths, addressing the balance of conventional optical systems.

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Abstract

An imaging optical lens system includes seven lens elements (E1, E2, E3, E4, E5, E6, E7) which are, in order from an object side to an image side along an optical path: a first lens element (E1), a second lens element (E2), a third lens element (E3), a fourth lens element (E4), a fifth lens element (E5), a sixth lens element (E6) and a seventh lens element (E7). Each of the seven lens elements (E1, E2, E3, E4, E5, E6, E7) has an object-side surface facing toward the object side and an image-side surface facing toward the image side. The second lens element (E2) with negative refractive power has the object-side surface being concave in a paraxial region thereof, and at least one lens surface of the second lens element (E2) is aspheric. The image-side surface of the sixth lens element (E6) is concave in a paraxial region thereof. The imaging optical lens system further includes an aperture stop (ST) located between the second lens element (E2) and the third lens element (E3).
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